Gas-engine.



No. 858,858. Patented out. 2, |800.

L. H. NASH.

GAS ENGINE. (Apxiucm'on med Jan. 25, 1897.; (Il o Ilodel.)

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Tus NoRms PETER: co. pHoro-urns., WASHINGTON. n. c.

UNITED STATES PATENT OFFICE.

LEWIS HALLOCK NASH, OF SOUTH NORWALK, CONNECTICUT, ASSIGNOR TO THENATIONAL METER COMPANY, OF NEW YORK, N. Y.

GAS-ENGINE.

SPECIFICATION formingpart of Letters Patent No. 658,858., dated October2, 1900.

Application filed Janua'ryZ, 1897. Serial No. 620,674. (No model.)

To (LZZ whom t may concern.'

Beit known that l, LEWIS HALLocK NASH, a citizen of the United States,and a resident of South Norwalk, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements in Gas-Engines, of which the following is a specication. I

My present invention relates to valves for 1o gas-engines; and itconsists ot' certain novel parts and combinations of parts particularlypointed out in the claim concluding this specification.

In the accompanying drawing I have shown i5 my invention embodied in theform which is at present preferred by me; but it will be ununderstoodthat various modifications and changes may be made without departingfrom the spirit of my invention and without eX- ceeding the scope of theconcluding claim.

The accompanying drawing shows a vertical section through the inlet andoutlet ports of a gas-engine, the valves controlling said ports beingshown in elevation.

Referring to the drawing, A is the cylinder of a gas-engine.

B is the inlet-port for admitting gasesto the combustion-cylinder, and Cthe outletport for exhausting the waste gases therefrom.

B' is a passage leading'to the air.

D is the inlet-valve, and E the outlet-Valve.

The two ports B and C and their passages B and C are contained in asingle casting, which casting is provided with comparatively- 3 5 longbearings E' and D for the valve-stems D5a and E2.

F F are spiral springs abutting at their upper-ends against the oppositecasting and at their lower ends against adjustable sleeves G G, attachedtothe valve-stems.

H is a bearing for the valve-stems, placed below the springs F F.

.I J are adjustable nuts for taking up lost motion in the valve-stems.

ports M M and carrying rollers K K, which rocking arms are controlled bycams N N. These cams are attached to a shaft O, to which a gear-wheel Pis attached, meshing with a pinion Q, attached to the main shaft R ofthe 5o engine. It will be observed that the countershaft O in thisconstruction `stands directly above the main shaft R of the engine andthat the rocking arms L L overlap, being fulcrumed on opposite sides. Bythese means 55 the elements are brought together in a small space, sothat they may be contained more readily, if desired, in a suitable frameof moderate dimensions without impairing the efficiency of the device.

The ports, passages, and the guides for the valve-stems are all made ina single integral casting, which is also provided with waterpassages S SS, forming a water-jacket. It will also be observed that the spiralspring E, which controls the action of a valve, is located between twobearings E and H or D' and H. The effect of this arrangement of parts isto relieve the Valve-stem of friction and wear. The presence of such aspiral 7o spring or analogous mechanism for reasons which are wellunderstood gives rise, as these parts are ordinarily made, to sidestrains, which are exceedingly injurious. By placing the spring betweentwo bearings these side strains are overcome and their ill effectsentirely neutralized.

What I claim is- In a gas-engine a plurality of puppet-valves havingparallel stems, rocking arms respec- 8o tively pivoted to said stems atone end and to fixed bearings at the other, said rocking armsoverlapping one another, and cams by ,means of which the said rockingarms and valve-stems are operated.

LEWIS HALLO CK NASH.

Witnesses:

M. WILSON, J. EDGAR BELL.

